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A computerized microassay for complement hemolytic activity using an automated spectrophotometer.

G Narchi, S Milani, F Tedesco

    La Ricerca in Clinica E in Laboratorio
    |January 1, 1987
    PubMed
    Summary
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    A simplified microassay estimates complement hemolytic activity by measuring red blood cell lysis absorbance ratios. This method allows for kinetic assessment, potentially detecting complement abnormalities missed by standard assays.

    Area of Science:

    • Immunology
    • Clinical Chemistry
    • Assay Development

    Background:

    • Complement hemolytic activity is crucial for immune function.
    • Standard assays for complement activity can be complex and time-consuming.
    • Accurate measurement of complement function is essential for diagnosing immune disorders.

    Purpose of the Study:

    • To develop a simplified microassay for estimating complement hemolytic activity.
    • To enable evaluation of lysis extent without separating cellular components.
    • To facilitate kinetic assessment of complement function for improved detection of abnormalities.

    Main Methods:

    • Utilized V-bottomed microplates for a streamlined assay procedure.
    • Calculated the ratio of absorbance at 405 nm to 450 nm to quantify lysis.

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  • Employed automated spectrophotometry and a computer program for data analysis (CH50 U).

    • Main Results:

    • The microassay successfully estimated complement hemolytic activity.
    • Lysis evaluation was achieved without the need for supernatant separation.
    • The procedure allowed for kinetic analysis of complement activity.

    Conclusions:

    • This microassay offers a simplified and efficient method for assessing complement hemolytic activity.
    • The ability to perform kinetic assessments may uncover complement abnormalities missed by conventional assays.
    • The developed procedure is suitable for routine laboratory use and research.